local utils = { }
utils.rules = { }
utils.globalkeys = { }

local host = io.popen("hostname")
utils.host = host:read("*l")

function utils.run_or_kill(command)
    -- Check throught the clients if the class match the command
    local lower_command=string.lower(command)
    for k, c in pairs(client.get()) do
        -- apparently some steam games don't have a client class
        if c.class ~= nil then
            local class=string.lower(c.class)
            if string.match(class, lower_command) then
                for i, v in ipairs(c:tags()) do
                    c:kill()
                    return
                end
            end
        end
    end
    awful.util.spawn(command)
end

-- http://awesome.naquadah.org/wiki/Autostart#Simple_way
function utils.run_once(prg,arg_string,pname,screen)
    if not prg then
        do return nil end
    end

    if not pname then
       pname = prg
    end

    if not arg_string then 
        awful.util.spawn_with_shell("pgrep -f -u $USER -x '" .. pname .. "' || (" .. prg .. ")",screen)
    else
        awful.util.spawn_with_shell("pgrep -f -u $USER -x '" .. pname .. " ".. arg_string .."' || (" .. prg .. " " .. arg_string .. ")",screen)
    end
end


function utils.joinTables(t1, t2)
    for k,v in ipairs(t2) do table.insert(t1, v) end return t1
end

function utils.rules.append(rules)
    awful.rules.rules = awful.util.table.join(awful.rules.rules, rules)
end

function utils.globalkeys.append(keys)
    globalkeys = awful.util.table.join(globalkeys, keys)
end

return utils